TABLE 2.

Fold induction of promoter activity in indicated medium condition^a

Strain	Medium condition	Result for promoter fusion
		mig-14::GFP		pmrC::GFP		pmrD::GFP
		Mean peak fluorescence (aue)	Fold induction	Mean peak fluorescence (aue)	Fold induction	Mean peak fluorescence (aue)	Fold induction
SL1344 (wild type)b	10 μM MgCl2	399	11.7	199	19.9	361	14.4
	pH 5.8	70	2.1	34	3.4	35	1.4
	PB	333	9.8	129	12.9	266	10.6
	Protamine	218	6.4	107	10.7	214	8.6
	PG-1	112	3.3	107	10.7	101	4.0
	Triton X-100	57	1.7	13	1.3	45	1.8
	SDS	56	1.6	39	3.9	53	2.1
phoP::Tn10c	10 μM MgCl2	6	1	1	1	4	1
	pH 5.8	6	1	5	5	3	0.75
	PB	26	4.3	1	1	9	2.25
	Protamine	5	0.8	1	1	5	1.25
	PG-1	4	0.7	1	1	4	1
	Triton X-100	6	1.0	1	1	4	1
	SDS	6	1.0	1	1	5	1.25
pmrA::Kand	10 μM MgCl2	798	20.5	1	1	509	11.6
	pH 5.8	67	1.7	1	1	42	1
	PB	805	20.6	1	1	212	4.8
	Protamine	286	7.3	1	1	222	5.0
	PG-1	104	2.7	1	1	158	3.6
	Triton X-100	56	1.4	1	1	58	1.3
	SDS	54	1.4	1	1	74	1.7

^aMean peak fluorescence values are for the populations grown under the condition indicated. Fold inductions were calculated by dividing the mean peak fluorescence values for growth under the condition indicated by the mean peak fluorescence values for growth in 10 mM MgCl₂ at pH 7.4 (values given in footnotes b, c, and d).

^bGraphic representations of these results are shown in Fig. 1. Mean peak fluorescence values of the bacterial population grown in 10 mM MgCl₂ at pH 7.4 are as follows: for mig-14::GFP, 34; for pmrC::GFP, 10; and for pmrD::GFP, 25.

^cGraphic representations of these results are shown in Fig. 2. Mean peak fluorescence values of the bacterial population grown in 10 mM MgCl₂ at pH 7.4 are as follows: for mig-14::GFP, 6; for pmrC::GFP, 1; and for pmrD::GFP, 4.

^dGraphic representations of these results are shown in Fig. 3. Mean peak fluorescence values of the bacterial population grown in 10 mM MgCl₂ at pH 7.4 are as follows: for mig-14::GFP, 39; for pmrC::GFP, 1; and for pmrD::GFP, 44.

^eau, arbitrary units.